Question

margaret has a bag containing 5 red chips and 5 blue chips. what is the probability of drawing two red chips in two draws without replacement??

Answer 1

well, what's the probability of drawing a red chip on the first draw?

Answer 2

1/2

Answer 3

are u there

Answer 4

yes, I am. Okay, after you've drawn a red chip, what is the probability of drawing a red chip going to be, if you don't put that red chip you drew back?

Answer 5

4/9

Answer 6

very good. so we have two dependent events, the first with P = 1/2 and the second with P = 4/9. How do we combine them?

Answer 7

multiply them

Answer 8

so its 2/9 right??

Answer 9

Good. the result is?

Answer 10

thanks you so much

Answer 11

yes, 2/9.